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HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth

HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth

Item # HG103
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HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth Tongue Weight Scale HG103
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Monitor your towing weight using your smartphone. Bluetooth receiver pairs with companion app to display tongue weight, pin weight, payload, and gross combined weight of your load. Receiver plugs into the OBD-II port on your vehicle. Lowest Prices for the best tools from Haul Gauge. HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth part number HG103 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Haul Gauge Tools - HG103

  • Hitch Tools
  • Measuring Devices
  • Tongue Weight Scale
  • Haul Gauge

Monitor your towing weight using your smartphone. Bluetooth receiver pairs with companion app to display tongue weight, pin weight, payload, and gross combined weight of your load. Receiver plugs into the OBD-II port on your vehicle.


  • Scale monitors your towing setup's important load measurements
    • Calculates tongue weight, pin weight, payload, and gross combined weight
    • Lets you know if you need to adjust your load before you tow or haul
    • Eliminates the need for separate or commercial scales
  • Weight distribution feature lets you verify weight distribution system is set up properly
    • See how weight is distributed across axles so you can make adjustments when needed
  • Receiver unit wirelessly transmits towing information to your smart device
    • Connects via Bluetooth for operation
    • Displays weight information through mobile app on your smartphone
  • Fast, plug-and-play installation makes setup a breeze - no tools required
    • Plug unit into the OBD-II port on your vehicle
    • Download free app to your phone and then calibrate
  • Preset calibrations let HaulGauge automatically pull vehicle specifications using VIN
    • 5-10 Minute guided manual calibration process available for vehicles made before 2008 or vehicles with modified suspension


  • Application: vehicles 1996 and newer
    • Weigh GCW feature requires an automatic transmission
  • Smart device OS requirements:
    • Apple (iOS): 10.3 or higher
    • Android: 5.0 Lollipop and higher, Bluetooth enabled
  • 1-Year limited warranty

Haul Gauge Unit and App

The days of weighing your trailer with a bathroom scale and construction site materials are long gone. Measuring pin weight and payload no longer requires a visit to a crowded weigh station. Avoid the hassle and get all of the needed weight measurements sent directly to your smartphone. This little device does the work for you to provide peace of mind and promote safe hauling.

Haul Gauge Compact Scale

HaulGauge is a compact device that easily plugs into your vehicle's OBD-II port and uses vehicle-specific data to measure and monitor your tongue weight, pin weight, payload, and gross combined weight in real time. Whether you're pulling a trailer behind your truck or you've loaded down your SUV's cargo carrier, it's important that you don't exceed the weight ratings of your vehicle or hitch. And HaulGauge makes it easy to avoid doing so.

Simple, Guided Setup

Haul Gauge Installed to OBD2 Port

Setting up HaulGauge is easy. First, plug the unit directly into your vehicle's OBD-II port, which is typically found beneath the steering column.

Haul Gauge Verify and VIN Screens

Open the free HaulGauge app on your compatible smart device and follow the step-by-step instructions for pairing HaulGauge to your smartphone via Bluetooth.

Next, the app will prompt you to scan your vehicle's VIN to search HaulGauge's vast preset calibration database. Many vehicles made in 2008 or later will have preset calibrations. If no preset calibrations are available, the app will guide you through a brief manual calibration process to ensure accurate weight readings.

Manual Calibration for Older or Modified Vehicles

Vehicles older than 2008 or those with modified suspensions may have to be manually calibrated. Follow the guided, in-app instructions to manually calibrate HaulGauge to your vehicle.

First, enter in your vehicle's curb weight. This can be found on the sticker on the inside of your door or in your owner's manual.

Next, you'll want to find an empty parking lot where you can perform 15 to 20 test runs. For each run, accelerate to 15 mph at varying throttle - this will ensure accuracy under different conditions. Manual calibration only takes about 5 to 10 minutes to complete.

How HaulGauge Works

OBD-II ports became standard in most vehicles in 1996. This port makes it easy to access your vehicle's computer for diagnostics and emissions testing. The amount of vehicle data available via the OBD-II port has increased over the years, allowing HaulGauge to tap into the specific data needed to determine weight. Sophisticated algorithms, along with an on-board accelerometer, are then used to calculate real-time weight with superior accuracy within 5%.

Haul Gauge Newtons Law

Let's travel back to high school physics class for a moment. As you may recall, Newton's Second Law of Motion states that the force of an object in motion is equal to the mass of the object multiplied by its acceleration. So, to determine the mass of an object - in this instance, your rig - we just have to take the force and divide by acceleration.

Acceleration is easy enough to determine thanks to the triaxial accelerometer built into the HaulGauge. Determining the force is a bit more complicated. Basically, HaulGauge pulls data about your transmission from your vehicle's computer and then uses a customized torque converter model to determine the powertrain effort.

Once the overall mass of your setup is determined, the HaulGauge will convert this to a weight. Then, to determine your trailer's fully loaded weight, the unit subtracts your vehicle's weight from the weight of the overall setup.

Weights Measured by HaulGauge

Tongue Weight

It's important to monitor tongue weight and adjust your load when necessary to ensure that you stay within the rated capacity for your setup. Simply put, too little tongue weight can cause trailer sway and too much tongue weight can cause your tow vehicle to perform poorly. You may have difficulty steering, gaining traction, or braking when driving a setup that has too much weight pushing down on the rear of the vehicle. Ultimately, towing with an improper tongue weight can cause you to lose control of your vehicle or cause your trailer to separate from the vehicle. Tongue weight should be approximately 10% to 15% of your gross trailer weight (GTW).

Pin Weight or Vertical Load

If you're towing a fifth-wheel or gooseneck trailer, HaulGauge will calculate the pin weight or vertical load. This is the downward force exerted by the trailer onto your truck bed. Like with tongue weight, knowing this measurement helps you to ensure that your trailer is properly loaded. An improperly loaded trailer is the number 1 cause of sway. Maintaining a proper pin weight will limit trailer sway and improve handling. This weight should be about 20% to 25% of your GTW.


Payload is important to monitor as well. This is the weight of both the cargo and passengers in your vehicle. Do not exceed your truck's gross vehicle weight rating (GVWR).

Haul Gauge Payload

The HaulGauge measures payload in real time, so you can see how every piece of cargo affects your load. This is great for estimating load charges or determining if your truck bed camper is overloaded.

Gross Combined Weight

HaulGauge measures your rig's gross combined weight to ensure that you're not hauling more than your vehicle and hitch are rated for. To do this, the unit subtracts your vehicle's curb weight from the overall weight of your setup to provide the weight of your trailer.

Knowing your gross combined weight is also helpful to determine whether you can drive over bridges with weight limits.

Weight Distribution

Haul Gauge Weight Distribution

The weight distribution feature measures weight across your vehicle's axles to verify whether your weight distribution system is set up properly. An unbalanced load or improperly installed system can cause dangerous sway conditions.

HaulGauge does the work for you so you don't have to use a tape measure and do manual calculations when setting up your weight distribution hitch.

HG103 Haul Gauge Wireless Trailer Tongue Weight Scale, Payload and Pin Weight Scale

Video of HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Haul Gauge OBD II Mobile Tongue Weight and Payload Scale Review

Hi there expert haulers. Today we're going to be taking a look at HaulGauge's tow safe vehicle and trailer weighing system. And this is it right here. It simply plugs into the OBD2 port found on all vehicles made 1996 and newer. And it's located typically underneath the dash below the steering wheel, where you plug it in and connect the app on our phone to it and we're ready to go. We can measure our tongue weight, the payload that's in the back of our truck.

We can set up our weight distribution system to determine how much weights on each axle. As well as determining how much the overall weight of our vehicle and what we're hauling is.Now you're probably wondering, well how does this little device do that Well there's a lot of complex measuring devices inside here. We're going to go over those and how they operate, calculate the weights at various aspects of your towing needs.Now while this does work on anything that's '96 and newer, like our 2001 Ranger over there. Anything that's 2008 and newer most likely has a calibration that's already stored inside here. So when you plug it in, it pulls your VIN and it already knows all the calibration information that it needs to make the correct calculations for all the weight that it's going to be measuring.

For things that are older than 2008, you will likely have to enter your VIN manually and also do a manual calibration process to get it all set up.We've got our boat here we're going to be hauling with our Ranger. Let's go ahead and measure the tongue weight. We'll begin by positioning the tongue of our trailer over our ball at the back of our truck and we're going to go ahead and hit the ready button. Okay, we can see here that we're currently at zero. So we're going to go ahead and lower down our tongue onto our ball and we're going to see how our measurements change.

And we want to make sure that our jack is completely off the ground, so all the weight of the tongue of our trailer is on our hitch ball.And you can see here that our scale is now measuring and we're sitting at around 300 pounds. You want to keep in mind that there is a slight deviation plus or minus about five percent. And that's pretty standard for just about all measuring devices.Now you don't have to use this to measure the tongue weight on your trailer. It can be used to measure all kinds of tongue weight. Whether you're using your SUV with a cargo carrier or bike rack and you got it loaded up.

You want to verify that you're not exceeding any of the weight limits on your vehicle or your hitch.For comparison we've got our Sherline tongue weight scale. You can also pick up here at etrailer.com. And it's measuring about 300 pounds. So as you can see they're both pretty accurate within one another. And this is here is a tried and true unit, that's got a good reputation of being an accurate scale for many years.Next we'll check out our payload weight. We've got some extra weight here we're going to be adding to our truck bed. I've gone ahead and pulled up payload in the app, zeroed it out by hitting ready and we'll get our extra weight in the back of the truck. We've got about seven coworkers in the back of the truck and you can see here we're reading about 1,000 pounds. Which is pretty accurate for what we have in the back. And now that everybody's exited the back of the truck, we're back down to zero.Now this could have easily been mulch or rock, and this way you can verify that you're not overloading the bed of your truck. In order for the HaulGauge to determine the total weight of both our truck and what we're hauling, our boat here. We're going to have to do some driving. So let's hop in and go for a drive.You can see here we're going to have to drive the vehicle due to an outline of what we're going to do. We're going to be driving it. We're going to start from a complete stop. We're going to go in a straight line. We're going to accelerate with half throttle up to about 15 miles an hour. And here you can see we're measuring in just a little bit under 10,000 pounds. And that's about accurate. Our truck weighs in at a little over 5,000 pounds, so the weight of our trailer plus our boat on it is making up that difference, bringing us close to 10,000 pounds.And now you're probably wondering, well why is this important Well this gives you the complete weight of your vehicle plus whatever you're hauling behind it. So all you have to do then is subtract the weight of your vehicle, which is written on the inside of your doorjamb and all you're left with is what you're hauling plus the weight of the passengers inside of the vehicle. This way you can ensure that you're not exceeding any of the towing capacities on your vehicle.You'll also know that you're not going to be exceeding any of the weight ratings on your towing components, such as your hitch, if you have a drop or rise. All those have weight ratings and you want to make sure you don't exceed them. Additionally, you know the weight of the entire vehicle together, which can be important when going over certain bridges that have weight restrictions on that bridge. You have your collective weight of your entire assembly and you'll know whether or not you're going to be safe crossing that bridge or not.Now there's a couple other measurements that you can take with the app. You can measure your pin weight, which is going to be for your fifth wheel trailers and your gooseneck trailers. So you can measure that right on top of the axle. It just helps recalibrate the system. So instead of checking for the weight of the tongue at the back of your hitch, it's checking for it over the axle where you have it on a fifth wheel or gooseneck. This is just going to make it more accurate and it's going to provide you with the same information that you would want to know to ensure you're not exceeding your tongue weight or pin weight capacities.For the weight distribution measurement, you'll receive two weights. The weight that's on your rear axle and the weight that's on your front axle. And this way you can use your weight distribution system to redistribute that weight and level it out. Now that's what a weight distribution does, but this way you can verify it with the app and determine that you've got it in the most distributed position possible, by verifying it's the same both front and rear. And there's a bunch of benefits by having your vehicle have its weight evenly distributed across both axles.It's going to help improve your handling by restoring that lost performance you had from lifting up on the front end. It's going to restore lost braking performance for similar reasons. It's going to be able to distribute the weight properly for your front brakes to dig in like they're supposed to. It's also going to help increase tire wear because your geometry or suspension is not going to be off wearing your tires more. There's a just a whole slew of things that it's going to help out with. And this will help you be accurate as possible.Many people want to know, well hey is this system going to be accurate and work with my auto leveling factory set up or the airbags that I've got installed on my truck And the short answer is yes. There are some stipulations like your airbags before you load up your vehicle. You want to make sure that you've got it at the lowest setting, which is typically about five to 10 psi. Then you load it up, get your measurement, and then you can air up your bags after you've taken your measurements. For your auto leveling, you simply just turn that off your cluster before you take your measurements. Then you can turn it back on after you're finished taking your measurements.Another thing people wonder is, will this work with my manual transmission on my truck And that is a bit of a mixed yes and no. The tongue weight, weight distribution, payload features, and your kingpin features, those will all work. It's still going to be able to determine the weight of those things loading down the back of your truck or your SUV. Now when it comes to the weight of the entire vehicle plus with what you're hauling, that feature will not work with a manual transmission. We've talked about before how the OBD device here is able to pull information from the modules on the vehicle. And part of the information it uses is slippage from the automatic transmission, since it doesn't have that with a manual. It cannot make the proper calculations for the complete weight. You won't even be able to calibrate that if you do have a manual transmission. But those other four features, which are some really big ones will still work just fine.People also wonder, will this work if I'm not on level ground or if I'm offroading And the short answer is yes. But if you're on a grade that's steeper than five percent, the measurements will be ignored until you get to a more level area, where it will then take the measurement. It's always recommended though to be on level ground to get the most accurate readings.Now some people are wondering, can I use this when I have other things plugged into my OBD port such as a tuner or an insurance tracker. And the short answer really is kind of no. You would have to purchase a splitter and the device would need to be mounted properly in order for it work properly. The best way to use it would be to plug it in, take your readings. And then if you have a tuner or an insurance recorder that you want to use, simply unplug your HaulGauge once you've finished taking your measurements, plug in your other devices and then go on continue your travels.Now for those of you with a lifted truck, you're probably wondering hey is this going to work properly with my truck The answer is yes, but it's going to be a little bit more set up. You won't be able to just use the VIN number to pull a calibration for your vehicle. You are going to have to go through the manual calibration. So that way it's calibrated for your specific suspension enhancements that you have on it.Customers are also wondering if they can get a digital readout on their app instead of the analog gauge that's displayed. And the answer is no. You are going to be stuck with the analog gauge here. But there's a reason for that and that's due to typical gauge accuracies are within about plus or minus five percent. So rather than give you a specific number, the needled gauge it's going to give you a relative idea. It's going to be closer to what the actual measurement is. And we already verified that it's pretty accurate when we compared it to our Sherline gauge. Speaking of the app, it will only work with newer Apple or Android phones. It will not function correctly with iPads or other tablet devices. You may be able to download the app and get some functionality out of it. But there is some issues with it working on those at this time.If you're wondering if your tow haul mode is going to affect its use while you're using it. You don't have to worry about that because the majority of the measurements that are taken are done below 10 miles an hour, which the strategy that your tow haul mode is going to implement on your vehicle isn't really going to affect it at such a low speed. So it's going to work just fine.Now this is my first time using the HaulGauge. I got to say I'm genuinely impressed. It worked very easily. It plugs in, the app is very user friendly to work with, easily describing all the steps that are necessary to take the measurements. And you get a lot more than you get out of just your typical tongue weight scale, like our Sherline. Yeah the Sherline's accurate, but you have to set it up, and you have to move your trailer around. It's kind of a hassle. With this, I just hook up my trailer like I was going to haul it normally and it takes the measurements. How easy can you getHere we'll show you how to get it set up on your 2008 newer vehicles. I've already downloaded the app on my phone. I'm going to insert the HaulGauge into my OBD port. Just under the dash here. I've opened the app here. You want to make sure you have Bluetooth on your phone turned on, as it points out here in step two. So we've got it plugged in. We've got Bluetooth on. We're going to search. It's able to find the device here, but it's asking us to turn the key on. We're going to go ahead and turn the key on.We'll go ahead and select it now. And here it pulls up a screen where you may have to enter it manually or you can scan the VIN. Sometimes it's able to pull the VIN, sometimes it's not. So we're just going to go ahead and click the scan button on the app. The app then uses the camera on your phone to scan the barcode. You can usually find the barcode located inside the doorjamb on a sticker here next to your VIN. Make sure you give the app permission to use the camera and then just aim your camera over the barcode. Give it a moment here. And then you'll be set on the menu.We're now inside of our older Ranger. We've got the HaulGauge plugged into the OBD port and we're going to get it set up to this one. This is an older vehicle, so it likely doesn't have calibrations available. It's going to go ahead and make us scan the VIN, just like I did on the other vehicle. I'm going to do that real quick. Now if the scan's complete and it's pulled up our VIN. You can see it comes to the same screen as it did on our newer vehicle. However, when we go to select the tongue weight, we have to perform a manual calibration. So we'll go and hit calibrate. Our engine is off. We'll go ahead and lower the tailgate on the back of the vehicle and we'll hit the next button at the bottom.Once we hit next, it pulls us up to the next screen where it instructs you to sit on the back of your tailgate, making sure that you're entirely off the ground. We've gone ahead and sent one of our fellow coworkers to sit on the back of the tailgate. He weighs about 150 pounds. So we're going to punch that in. And we'll hit our continue button. And now it's completed. The app was able to take the VIN number that we provided, so it knows what vehicle we're working with. We entered in the amount of weight that we placed in the back. It then took measurements using the accelerometers that are inside of the unit and was able to determine the suspension that our vehicle has and is now ready to measure our tongue weight.Once the calibration's complete from selecting the tongue weight. All of the options down here below: tongue weight, payload, weight distribution, and pin weight are ready. The weigh located here at the top does have a different calibration procedure that needs to be performed for it to operate. This will give you the total weight of your vehicle plus what you're hauling behind it. We'll go ahead and calibrate this too.You'll find your vehicle weight on the sticker located in the doorjamb. We'll then enter our max cargo weight. You'll find this on a separate sticker that's located in a similar location in your doorjamb. So we're going to go ahead and punch that in. We'll now put in the weight of the driver. So put my weight in there. Now we'll need to drive the vehicle around to complete the calibration set up.You'll want to lightly accelerate while driving in a straight line. Once you've done your light acceleration, it'll ask you to do a medium acceleration. And the next time it's going to ask you to do full acceleration. You'll need to repeat this process following the directions until it's completed here with your progress bar at the bottom. We're going to go ahead and finish this now.You'll want to make sure you do this in an area where it's free of traffic where you can do this multiple times until it completes it's calibration. An empty parking lot is a great place to do it. The whole process took about 10 minutes to go through the cycles and when you're complete, it'll tell you here on the screen. We'll just hit OK and we're now ready to go and it's prepared to weigh our vehicle, along with all the loads we have in either the back of the truck or on our trailer that we're pulling.Now you're probably wondering, well why did I do all that and what is starting and stopping do for me and how is it able to determine the weight Well it does this with a lot of different information that it's gathering. It's plugged into your OBD2 port, which allows it to communicate with all the modules that's in your vehicle. So it's going to be looking at engine load. It's going to be looking at your automatic transmission's clutch slippage. It's going to take that information to account along with the accelerometers that are inside the HaulGauge that determine when the vehicle dips down in the back, lifts in the front. And it uses all that in collaboration with your VIN, knowing what vehicle it is to determine how your suspension is reacting to the weight that's supplied on it. It can then use all that to calculate the weight that's applied in the bed of your truck or on your tongue of your hitch or in the back of your SUV.And now with everything calibrated, you're ready to start taking your measurements and get towing. And that completes our look at HaulGauge's tow safe vehicle and trailer weighing system.

Customer Reviews

HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth - HG103

Average Customer Rating:  4.7 out of 5 stars   (25 Customer Reviews)

Monitor your towing weight using your smartphone. Bluetooth receiver pairs with companion app to display tongue weight, pin weight, payload, and gross combined weight of your load. Receiver plugs into the OBD-II port on your vehicle.

- HG103

Works well as advertised.!!! 691906

- HG103

The Haul Gauge didn't capture my vin tag correctly. Contacted Haul Gauge responded very quickly and gave me a resolution that worked great. Very impressed with Haul Gauge so far and I think it will be a very useful tool. Thank you 711408

- HG103

Arrive ahead of time and as described Down loaded easily. It knew the ID of the truck even though it is a 2007 F150. Wondering if I need to do the Manuel set up since it knew the vin#? 680769

I reached out to my contact at Haul Gauge and he confirmed that you are good to go since the device was able to pull your vehicles identification information. He said that if it needed to calibrate the vehicle it would have prompted those steps during setup.
-- Victoria B - 08/08/2019


- HG103

I've only used this a couple of times but I was blown away when I climbed into the back of my truck and it showed my weight accurately. It gave me peace of mind knowing that I now will have a way to weigh my trailer and RV without having to go to the scales every time. It certainly isn't 100% accurate but accurate enough for me to know if I'm exceeding my pin/hitch weight. I had a question regarding adding suspension modifications to my vehicle and the ability to use this with the modifications added. I sent an email off to the manufacturer of this product. Within 24 hours I had an answer and it was one that allows me to continue to use this product regardless of the modifications. Only some slight calibration would be needed. I'm looking forward to using this product more in the future and based off of other reviewers, I think I will be very happy owning this device as well. 691257

- HG103

works great easy to set up 680676

- HG103

I pull a variety of trailers with a 2019 GMC 3500 long bed, 4 door, dually. I weigh my loads at CAT scales regularly. Instructions are almost zero and not completely intuitive to a 69 yr old. It took about 1 1/2 hrs to set it up. The device didn't recognize my truck immediately, customer service (I believe the developer) answered my questions. It took 550 lbs on the tail gate to register a base for tongue wt . The unit does seem to be accurate to 10% as claimed but that is 1000 lbs on 10,000. Doesn't take the place of commercial scales but interesting and fun. 681050

- HG103

Not exactly sure how it works but it does work as advertised. Saves time and money going to scales. Easy setup and easy to use. 671056

- HG103

Product worked as described. Installed in under 1 min and my initial gross vehicle weight displayed on the app was within 5% of actual scale weight. App is simple to use and understand. 678910

- HG103

Prompt delivery of my new HaulGauge. So far the HaulGauge is living up to its billing providing reliable numbers. Makes it very easy to see what you loaded trailer weighs and if your WDS is setup correctly. Only used it for initial set up and configuration. I’ll have a better idea after a couple of trips. 661416

- HG103

So far, so good. Easy installation and calibration , helpful YOU TUBE videos available for the non-techies , reported weights are within very close range to CAT scale weights. Must have WIFI or cellular service however which is a problem for me so have to do the measurements on the road. Very handy. Works as advertised. 660666

We have received the following information from Thomas our contact at HaulGauge Thanks for the great review! To clarify, an internet connection either phone service/data or Wi-Fi is only required for the initial setup. After setup, HaulGauge requires no internet connection. Without an internet connection, HaulGauge will not be able to locate any preset calibrations and the user will be asked to go through a calibration procedure.
-- Rachael H - 07/02/2019


- HG103

So far I can only rate the purchase and shipping were both easy and fast. As well as the fact I have called twice with questions prior to install and got very quick and curtious answers both times. I have plugged it in and it recognized my truck and vin. Immediatley. I’ve yet to check truck weight and trailer weight etc. will be doing that this weekend and will doam update. So far, all good and a good value. A tounge weight scale by itself, doing nothing more, costs more than the haul hauge. Very pleased with my purchase so far. 648008

- HG103

I've got a 2017 GMC 2500 with Diesel engine. This product was a complete fail. Firstly it would not read my VIN even though my cheap $20 scanner could w/o a problem. So I manually entered my VIN and confirmed my model. I then followed the instruction to zero the scale. Oops, you have to unload the truck to do this -- everything! I did that (in 96 degree full sun). Then it says with engine off to start loading. I put 2 spare tires in the back (100lbs), the needle moved a tad, but did not register 100 lbs. Next I put another 600lbs of tools etc into the back. Total weight 700lbs (I weighed everything with a very accurate digital scale). The reading was now 200lbs -- FAIL! I took everything out again and started over -- just to be fair. While loading the 2nd time I by accident closed the app and when reopened, guess what --- start over, no way to add anything and get a weight. Nice idea of a product but a complete fail IMHO. I'm a computer nerd by trade so it's not like I didn't use it correctly. Thankfully etrailer.com stands by what they sell 100% and promptly took it back. 663098

According to HaulGauge, there are some updates that have not yet been added to the instructions. In order to get the VIN to read, youll want the vehicles engine on. It is NOT necessary to completely unload the vehicle, in fact any everyday items carried like a tool box, etc should be left in place. Because on the 2017 GM, the 2500 and 3500 suspensions are different, youll need to manually configure the calibration by going into the settings menu, clicking calibrations, then suspension calibration. This process should just take a minute or two.
-- Mike L - 07/12/2019


- HG103

Easy to install and use . Watched online tutorials prior to purchasing. Have not utilized all functions yet. 649911

- HG103

Product arrived with no package but was installed and worked good upon arrival. Thanks again for quick shipping and good transaction. 657165

- HG103

Haven’t had it long enough to really use it much I took my dump trailer to the dump 700 pounds different from the scale at the landfill 693179

- HG103

The Haul Gauge works great! Product arrived and does exactly what the videos on eTrailer said it would. I have a 20 year old truck that required it to be calibration before the Weight readings would function. Newer models should work straight from the VIN. Within just a few minutes I confirmed my tounge weight and payload which was almost exact. This will be great to use with boat trailers, equipment trailers & hauling loads to always know that I'm not overloaded which helps to also extend the life of all my hauling trucks with one easy to use device. 663309

- HG103

The unit is easy to install and works as indicated. I would recommend it to anyone. 740274

- HG103

Purchase and delivery from etrailer were as always excellent. Setup the HaulGauge with a couple of minor issues. Had to remove Android Auto from my phone as it was interrupting the Bluetooth connection to HaulGauge. Also took a little effort to find a level road. Was able to weight my truck. HaulGauge showed 6000 pounds. CAT scale showed 6060. Excellent match. Looking forward to trying the other measurements. 722247

- HG103

Haven't had a chance to use it yet, so this review is strictly about etrailer's handling of the purchase. Competitive pricing (identical to [online retailer]), excellent communication from order to shipment and it was quick to leave their warehouse once ordered. etrailer does it right again. 711048

- HG103

It was easy to use 705776

- HG103

Impressed with the ease of use and the accuracy of the Haul Gauge and app. 694867

- HG103

Im no pro at this stuff but the installation went fairly easy. I read the instructions and watched a video. Delivery was prompt too. 696528

- HG103

I have not had a chance to try it out yet but as with all the items I have purchased from etrailer I’m sure it will be as advertised. 690745

- HG103

Kind of neat Seems to work as described 680163

- HG103

Great deal, was able to get the weights I wanted, had some minor trouble but with great customer service I was able to remedy them ( all were my inability to do computer stuff). Thanks 679699


Ask the Experts about this Haul Gauge Tools

  • Can HaulGauge Suspension Enhancement be Used on Truck with Suspension Enhancement
    Yes, the Haulgauge part # HG103 can be used on vehicles with suspension enhancement like yours but you do need to run it through a manual calibration and you'd be set. It's a very short and easy process that the # HG103 will guide you through. To calibrate, go to Settings (gear symbol) -> Calibration -> Suspension Weighing. The app will guide you through a 2 minute process where you open the tailgate and sit on the back of the truck. From other users we have learned (to be accurate)...
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  • Does Tow/Haul Mode of Truck Affect Performance of Haul Gauge HG103
    Tow haul mode does not affect the performance of the Haul Gauge part # HG103 since most of the measurements it takes are below 10 mph which is before tow/haul mode affects anything.
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  • Is HaulGauge Mobile Tongue Weight and Payload Scale Compatible with Toyota Vehicles
    I reached out to my contact at HaulGauge and he said that the pairing issue with Toyotas has indeed been fixed. In fact my contact was the very person who worked on this. As of May 2019 there are no longer any problems between the HaulGauge # HG103 and the computer systems on Toyota vehicles.
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  • Can HaulGauge Mobile Tongue Weight and Payload Scale part # HG103 Work on 2019 Ram 1500
    Yes, the weight function of the HaulGauge Mobile Tongue Weight and Payload Scale part # HG103 will function just fine with your 2019 Ram's auto-leveling air suspension. The other functions (Payload, Tongue Weight, Pin Weight, and Weight Distribution) use vehicle pitch, so they will not function properly unless auto-leveling is turned off. This is usually done in the vehicle’s console by putting the vehicle into “tire jack mode,” which must be turned off before driving.
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  • When Using HaulGauge For Multiple Vehicles Does It Need to be Calibrated Every Time
    I reached out to my contact at HaulGauge regarding the Mobile Tongue Weight and Payload Scale # HG103. The first thing he wanted me to note is that while there is a better chance that pre-2008 model vehicles will need to be manually calibrated when plugging in the unit it's certainly not guaranteed. There's still a decent chance that the HaulGauge will be able to automatically pull vehicle information as soon as it's plugged into the OBD II port on both your 2001 Ranger and 2008 Lincoln...
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  • Can the HaulGauge Monitor Different Functions of Tow Vehicle
    I do have a solution for you to keep an eye on various stats for your 2008 Chevy Tahoe while you're towing but the HaulGauge Mobile Tongue Weight and Payload Scale # HG103 is only designed to determine weight ratings for your towing setup and it doesn't have the ability to sense and display anything else. If you are only wanting to monitor those things then I recommend using the Edge Insight CTS2 # EP84130 which is a monitor system with a touch screen for easy navigation. This product...
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  • Does The HaulGauge Tongue Weight Payload Scale Measure Weight On The Tow Vehicle Axles
    The HaulGauge Mobile Tongue Weight and Payload Scale part # HG103 will weigh the truck without the camper connected and with the camper connected to tell if you are going over the gross combined weight rating of your vehicle with the trailer attached. It will also tell you the payload weight in the vehicle (the weight of both the cargo and passengers) and the tongue weight. However, the HaulGauge does not determine physical weights on the axles. It does have a weight distribution feature...
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  • Will HaulGauge Tongue Weight Scale Work on Motorhome and How Does It Receive Information
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale # HG103 will work on a motorhome that's towing a vehicle. This unit plugs into the vehicle's OBD II port and does indeed gather information based on its VIN. With that being said you can also manually calibrate the system if the vehicle you are using it on is equipped with aftermarket components that affect the stock numbers or if you simply know that the listed stock numbers aren't quite accurate for whatever reason. The system...
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  • Will HaulGauge Mobile Tongue Weight Scale Work on 2014 Jeep Grand Cherokee With Auto Leveling
    The main weight feature of the HaulGauge Mobile Tongue Weight and Payload Scale for OBD II # HG103 will work on your 2014 Jeep Grand Cherokee with auto leveling. However, according to HaulGauge you do need to turn off the auto-leveling feature of your Grand Cherokee: "The other functions (Payload, Tongue Weight, Pin Weight, and Weight Distribution) use vehicle pitch, so they will not function properly unless auto-leveling is turned off. This is usually done in the vehicle’s console by...
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  • Does the Orientation of OBDII Port on Vehicle Affect Performance of HauGauge HG103
    HaulGauge part # HG103 works in any orientation, and is programmed to recognize the orientation. In fact, in a case like your Toyota Land Cruiser HaulGauge will ask you to verify the orientation when you first setup and launch the HaulGauge app.
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  • Will HaulGauge Mobile Tongue Weight and Payload Scale Work on 2018 Honda Ridgeline
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale # HG103 will absolutely work on your 2018 Honda Ridgeline. This will plug right into the truck's OBD II port and gather vehicle information using the VIN. You can also manually make calibrations if needed to accommodate for any aftermarket components that you may have added. I have attached a really great, in-depth video review on this unit that you can also check out.
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  • Will HaulGauge Mobile Tongue Weight Scale Work on Vehicle with Aftermarket Modifications
    I reached out to my contact at HaulGauge regarding the Mobile Tongue Wight and Payload Scale # HG103 and he said the aftermarket suspension and larger-than-stock tires on your FJ Cruiser will not present any issues. The HaulGauge does plug into the OBD-II port to read vehicle data but it can be manually calibrated to account for aftermarket components like what you have. This will allow it to give you accurate readings based on your specific vehicle configuration. I have attached a...
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  • What Sensors Does HaulGauge HG103 Use to Determine Weight
    HaulGauge measures weight by monitoring powertrain effort and vehicle acceleration. Powertrain effort is calculated from a torque converter model. HaulGauge # HG103 uses the VIN of your vehicle to search its database for the correct torque converter calibration. If HaulGauge doesn’t find a calibration within the database, the app will guide the user through a calibration. Acceleration is determined using a triaxial accelerometer on-board HaulGauge. When powertrain effort is high relative...
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  • How Does HaulGauge Mobile Tongue Weight and Payload Scale Work?
    The HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth # HG103 simply reads your vehicle information and lets you know the parameters outlined by the manufacturer for safe towing of your specific vehicle. It then calculates weights based on force divided by acceleration. I've attached a photo to help with the manufacturer's explanation. HaulGauge measures weight by monitoring powertrain effort and vehicle acceleration. Powertrain effort is calculated from a torque...
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  • Can HaulGauge Be Used on Truck with Air Bags or Auto Level Suspension
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale # HG103 will absolutely work on your 2015 GMC Sierra 2500 that's equipped with air bag suspension. The HaulGauge will use information from the Sierra's module and VIN but you are also able to make manual adjustments/calibrations to accommodate features like this. When initially calibrating the unit you will just want to drop the air bags down to their lowest level (typically 5 to 10 psi) or turn the auto-level feature off on...
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  • Does HaulGauge Save Calibrations for Use Between Two Vehicles
    The HaulGauge Mobile Tongue Weight and Payload Scale # HG103 does save the calibrations. When I reached out to HaulGauge, this is what they told me: "The HaulGauge app stores the vehicle’s VIN and any calibrations. If you move the HaulGauge to another vehicle, you will have to go into Settings (gear symbol) - Change Vehicle. This will erase any custom calibrations and find the new vehicle’s information.  If your vehicle is in our calibration database, changing vehicles will not be...
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  • Can HaulGauge Mobile Tongue Weight and Payload Scale for OBD II Be Used on More than One Vehicle
    Yes, you can use the Haulgauge part # HG103 on more than one vehicle. It requires programming the phone you use it with to the vehicle so if you plan to switch between vehicles frequently it will be easiest if you use two phones or devices so that you aren't reprogramming the VIN info etc.
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  • Will HaulGauge Tongue Weight Scale Work on Vehicle With Suspension Enhancement
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale # HG103 will work on your 2018 Ford F-350 with SumoSprings such as the # SSR-127-54 that fit your truck. According to HaulGauge, "The main Weigh feature, which weighs the vehicle and anything attached to it, will function just fine with bump stop suspension enhancements. The other functions (payload, tongue weight, pin weight, and weight distribution) use vehicle pitch, so a short calibration will be required." Per HaulGauge...
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  • Can HaulGauge Mobile Tongue Weight and Payload Scale Be Used on 2015 Honda Odyssey
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale for OBD II # HG103 will work great with your 2015 Honda Odyssey! It is not limited to only working on trucks and would work great for your Odyssey.
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  • Can HaulGauge Mobile Tongue Weight Scale part # HG103 Be Used with Suspension Enhancement
    Suspension enhancement like the Timbren kit you have installed on your 2019 Ford F-250 will affect the numbers of the Haulgauge # HG103. According to them a manual calibration would be required with this setup and that the Timbren would need to touch axle plus a set weight to calibrate. Here are the instructions they gave us for how to do this: HaulGauge measures pin weight using the pitch of the vehicle. Because your suspension is not stock, a short calibration will be required. To...
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  • Will HaulGauge Work on More Than One Vehicle
    I reached out to HaulGauge to ask about using the HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth # HG103 on multiple vehicles in the manner you asked and they told me you can use the scale with multiple trucks: "in most cases this is easiest using multiple phones. The HaulGauge app stores the vehicle’s VIN and any calibrations. If you move the HaulGauge to another vehicle, you will have to go into Settings (gear symbol) -> Change Vehicle. This will erase any...
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  • Can HaulGauge be Used on a Truck with a Manual Transmission
    Some of the features can work with the Haulgauge part # HG103 on manual transmission vehicles but not all of them. The tongue weight, weight distribution, payload features, and pin weight features will work but the total vehicle and trailer weight features will not due to the lack of a torque converter like you mentioned.
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  • Can HaulGauge be Used to Make Sure Vehicle Towing Capacity Isn't Exceeded
    The HaulGauge part # HG103 that you referenced will allow you to know exactly how much tongue weight and total trailer weight you'll be towing so that you can safely stay under your towing capacity. Hopefully your plan is to tow with the trailer below the max weight you listed of 10,500 lbs as we can't recommend you exceed your Tundra's towing capacity even if it's only by 400 lbs. I attached a review video for this for you to check out as well.
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  • How To Calculate Total Tongue Weight
    If 380 pounds is the tongue weight of your trailer, then you are correct. You add the tongue weight of the trailer to bike rack and bikes, and that total is your total tongue weight. Make sure you are within the tongue weight capacities of both your hitch and your 2005 Dodge Dakota. If 380 pounds is your hitch or vehicle capacity, you would subtract the bike and bike rack weight. 380-(75+45)=260 pounds of capacity left. Trailer Tongue Weight + Bike Rack Weight + Total Weight of...
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  • Will The HaulGauge Work With Diesel Vehicles
    The HaulGauge Mobile Tongue Weight and Payload Scale for OBD II - Bluetooth part # HG103 works with Diesel vehicles that are 2004 or newer so it is not a fit for the 1999 F-350 diesel. We do carry the Sherline Trailer Tongue Weight Scale - 2,000-lb Capacity part # 5780 which I know is not as cool as the HaulGauge but works to read the tongue weight of your setup.
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  • Can HaulGauge Mobile Tongue Weight Scale Be Used on 2020 Ford F-450 Motorhome
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale # HG103 will work perfectly on your motorhome that's built on the 2020 Ford E-450 chassis. The unit will plug into the OBD-II port under the dash and gather information on the vehicle using its VIN. Since RV's will vary in terms of weight, capacity, etc, (separate from the base chassis specs) you can then manually calibrate the system so that it's set up perfectly for the motorhome. This is going to provide you with an accurate,...
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  • Will HaulGauge Mobile Tongue Weight Scale Work on 2014 Lincoln Navigator and Equal-i-zer WD System
    The HaulGauge Mobile Tongue Weight Scale # HG103 that you referenced is a perfect solution for keeping track of your trailer weight and making sure everything is set up correctly on your Equal-i-zer Weight Distribution System. For someone who is mindful of their towing weights (thank you by the way - this is all too rare...) I can't think of a better option to have on hand at all times. Once you plug the HaulGauge into your Lincoln Navigator's OBD-II port, you will immediately be able...
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  • Can HaulGauge be Used When Towing Fifth Wheel Trailer
    Yes, the HaulGauge part # HG103 can be used on a truck towing a fifth wheel trailer. It can calculate the pin weight of the trailer too. The pin weight is the amount of vertical weight the trailer puts on the hitch in the bed of the truck. It also can calculate the total weight of the trailer too. I attached a review video for this for you to check out as well.
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  • Can HaulGauge Mobile Tongue Weight and Payload Scale Be Used on 2017 Ford F-350
    Yes, the HaulGauge Mobile Tongue Weight and Payload Scale for OBD II # HG103 does work on your 2017 Ford F-350 diesel. It can be used with the camper shell you have installed as well. It can be used as a way to measure the weight of the camper/topper if needed as well. I attached a couple review videos for you to check out as well.
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  • Will HaulGauge Mobile Tongue Weight and Payload Scale Work With 2008 Ford F-150
    The HaulGauge Mobile Tongue Weight and Payload Scale # HG103 will definitely work on your 2008 Ford F-150 and in fact will work on all cars and trucks that are model year 1996 or newer because this is the year when it was required that vehicles have an OBD-II port. This port is what the HaulGague will plug into and allow you to use the weight distribution feature so you can know if your system is properly set up; you will be able to see precisely how the weight is distributed across...
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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Jameson C
Video Edited:
Jacob T
Video Edited:
Chris R
Installed by:
Kathleen M
Video by:
Dustin K
Test Fit:
David F
Written by:
Kristina F
Updated by:
Matthew E
Updated by:
Noah M

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